Cribbing



June s, 1933. 6. wrowms 1,913,129v

' origina; Filed Aug. 23, 1930 [N VENTOR ATTORNEYS Paenajunes,f1ea3 i1,913,129

gUNITED STATES PATENT ol-Flc GEORGE w. POWERS, or CLEVELAND, omo

calname Application filed August 23, 1930, Serial No. 477,445. RenewedOctober 16, 1931.

This invention relates to the art of cribthese members throughout thegreater porbing for use in connection with retaining tion of theirextent may be ofcylindrical walls and the like, l form and theiroverlapping portions formed One object of the present invention is to fsquare cross-section so as to facilitate the 5 devise a cribbingstructure in which the `interlocking engagement of the same. 55l

stretcher and header members are hollow and In the actual COHSI'LlCtiOn0fV the stretcher Y are formed of sheet metal of such nature as to andheader members, they are first formed be proof against ,deteriorationfromthe mitlnto the particular shape and the joints of iii-a1 elements,the overlapping edge portions are welded,n

i0 Another object, consists in devising an imand there are welded alsoto these members 6C proved means of interconnection between the theCODIleCting means to be hereinafter deoverlapping portions of theStretcher and scrlbed. Then, as the iinal step,the stretcher headermembers-so that the same may be readand header members are galvanized soas to l. ily assembled and disassembled, render them proof against thenatural ele- Another objeet Consists in providing e filler ments. Anyother form of rust-proof metal 3a V means for insertion between `thestretcher may be 11S members so as to prevent escape of the mate- Theremay be employed Venous forms of `Tiel thereloef-,Weeml connecting meansbetween the overlapping Other objects will appear from the followoltlons,of the' stlfetohel an@ header meming description and claims whenconsidered ers, the Preoeot dlsolosufe belng merely fol' 70 to etherwith theaccompanyin drawing. Purposes of lllustletmi one gener81T tyReof ig. 1 is a perspective View il ustrating one eonneetlon Whloh may eadopted for elthel means of interconnection between the stretchtemPoIelyo1' Permanent oolleetlon between er and header members; Fig. 2 is amodificathe mBmbeIS- In; any event, the hollow Lion of Fig, '1; Fig 3 iso, perspective view stretcher and header members are reinforced 75illustrating the manner of applying a filler thrOnghOut the reglons oftheir overlapping between the stretcher members; Fig. 4 is a pOljtlOnsby means of the plugs or mserts 3 perspective view of a portion of afiller; Fig. WhlCh are placed Within each of these hol- 5 is anelevation of a modified form of filler; low members These Inserts mayconslst of Fig, 6 is a plan view of a modified foi-m of metal, wood, orother suitable material which 80 Stretcher member to be used inconnection will not only serve'to reinforce against vertiwith the iillershown in Fig. 5`; Fi 7 is an C211 ComPIeSSlVe Stresses the Overlappingp0rend View of a Still further modifie form of. tions preferably ofthese members which are filler; Fig. 8 is an elevation thereof; Fig'. 9Called upon to sustain the maximum strain,

is a to lan view of such modified form of but these inserts serve alsoas a means of ex- 85 filler; 1g. 1 0 is a dia ammatic crom-seccludlngthe natural elements from the inside tional view indicating t e generalassembly 'of the hollow members. These inserts may of the stretcher andheader members. extend to any p`oint desired within the hol- Accordingto the present.v invention, the low members, although it is suicient for4o stretcher members 1 and the header members them to extend Only to apoint corresponding 90 2 are formed of sheet metal, each of such 'withthe limits o 'the overlapping engage- 4 members being formed of a sin lesheet layer ment between the stretcher and header memwhich is formedinto the desirez? hollow shape bers'. For example, in the arrangementsand the ed e ortions thereof welded in overshown in Figs. 1 and 2, it issufficient for the lapping re ation at the corner. lIn the presinsertswithin the ends of the stretcher mem- 95 ent case, the stretcher andheader members bers to extend only half the distance of the are shownasof square cross-section throughinsert within the end of the headermember out their entire extent, although it is to be since the stretchermembers are l'arranged in understood that any other particular shapestaggered joint relation. v Concrete inserts or design may be adopted;as, for instance, may be used.

5 channel members serve to receive the stretcher members which areengaged within the saine either at the middle portion thereof or instaggered arrangement as herein illustrated. These channel members 4 areof such dimensions that the stretcher members may be conveniently seatedtherewithin for effective en'- gag'ement, while at the same timepermitting disassembly of the entire cribbing structure, if so desired.

In Fig. 2, the channel members 4 are disclosed as being secured to a capmember 5 which seats snugly over the end portion of the header member 2andwhich has a closed end for engagement overj the previously appliedinsert 2. The cap member may be welded in such position, it beingunderstood that all ofthe several parts of the engaging means aresecured in proper'. position prior to the galvanizing of the members asabove explained. t Under certain conditions, it is deemed advisable toprovide a Iiller means between the stretcher members so as to preventthe slipping of loose material such as silt, etc., through the cribbing.Such a filler may be in the form of a channel member 6 of sheet metalform which is laced between the stretcher ymembers and w ich has itsmiddle face substantially flush with the outer surface of the stretchermembers. This form of filler has its edge portions flanged, as indicatedat 6'? Vso as to engage about the corner portions o the upper and lowerstretcher members. In this way, the filler is maintained in positioneven more securely by the force of the material within the cribbing, andthere may be provided also thepstrip or strips 7 welded to i the {ianges6* as a means of bracing the vupper 'and lower portions of this form ofiller.

Another form of filler consists, of a single vilat sheet of metal 8provided with integrally formed ears 8a upon the bottom and top edgesthereof. These ears are adapted to be re-` ceived in the correspondingslots 9 in the top and bottom of the stretcher members. These slots areherein shown as being located substantially midway between the front andback of the stretcher members.

A still further form of filler is illustrated in Figs. 7, 8, and 9 whichshow a sheet metal channel member with integrally formed ears on the topand bottom flanges thereof for interlocking engagement withincorrespondingly formed and positioned slots in the top and bottom of thestretcher members. These channehmembers may be so positioned be- -tweenthe stretcher that the main wall of the filler will be flush with thefront surface of the stretcher members or these fillers may be locatedat any other desired point between the front and back of the stretchermembers. The various forms of fillers will also be galvanized so as torender them rust-proof afterbeing formed into the desired shape.

By virtue of the hollow. metal construction herein set forth, thecribbing structure here presented can be formed up with comparative easeand can be set in place for ermanent location or canbe disassemble atany time with the same degree ofconvenience. Because of the protectionafforded against attack of the natural elements, the stretcher andheader members in the present invention are calculated to haveconsiderably longer life than the forms of structure heretoforeemployed.

This cribbin structure can be manufactured sure caps for engagement overand about the l overlapping portions of the headers, said caps havingchannel portions extending transversely of the top and` bottom of theheader members so as to providejinterlocking engagement between saidmembers.

2. A cribbing structure comprising hol- I low sheet metal stretcher andheader members having the ends thereof formed to provide flat loadbearing walls extending in parallelism, said members being arranged tohave said load bearing walls in overlapping load bearin relationship,means for secur# ing said en s in assembled load bearing relationshipand insertable reinforcing means positioned within said members andcontact-A ing with interior surfaces of said flat Aload bearing walls tothereby increase the resistl ance of said header and stretcher ends tocompressive stresses.

3. A cribbing structure built of stretcher and header members comprisingsheet metal body members formed with hollow openends and having saidendsv formed to provide a fiat load bearing wall connecting side wallsextending in parallelism, said members being arranged in the structureto have said load bearing wall and said side walls thereof inoverlapping ldad bearing relationship, means for securing saidoverlapping ends in assembled load bearing relationship and sheet metalclosure means secured to v said overlappin ends of said members andcontacting wit said ilat load bearing walls and serving to close theends of said hollow sheet metal members.

I 4. A cribbing structure built of stretcher and header memberscomprising sheet metal body members formed with open ends and havingsaid ends formed to provide a flat load bearing wall and side wallsextending in parallelism, said members being arranged to have said loadbearing wall and said side stresses.

5. A cribbing structure comprising hollow sheet metal stretcher andheader members having the ends thereof formed Ato provide ilat loadbearing walls extending in horizontal parallelism, said members beingarranged to have said load bearing walls in overlapping load bearingrelationship, means mount- 'ed on the header members and engaging thestretcher members for securing said ends in, assembled load bearingrelationship and insertable reinforcing' means positioned within saidmembers and contacting with interior surfaces of said dat load bearingwalls to thereby increase the resistance of said header and stretchermembers to compressive stresses wherever the header and stretchermembers are engaged by said securingmeans.

G. A cribbing structure comprising hollow sheet metal stretcher andheader members having at one or more points intermediate the endsthereof flat load bearing Wall portions in parallel spaced relationshipconnecting side walls extending in parallelism. said members bein garranged in the structure i tohave said load bearing wall portions andsaid side walls thereof in overlapping load bearing relationship, andreinforcing means associated with said load bearing wall portions andsaid side walls in the load bearing position to carry part ofthevertical compressive stresses.

7. A cribbing structure comprising hollow sheet metal stretcher` andheader'members havingat one or more points intermediate the Yendsthereof flat load' bearing wall port-ions inparallel spaced relationshipconnecting vertical Valls, said members being arranged in the structureto have said load bearing wall y portions and said Vertical walls inoverlapping load bearing relationship, and reinforcing means associatedwith said load bearing Wall portions and said vertical walls 1n the @loa d bearin g positionvto carry part ofthe vertical compressivestresses.

8. A. cribbing structure comprising hollow sheet metal stretcher andheader members having at one or more points intermediate the endsthereof flat load bearing wall portions in parallel spaced relationshipconnecting vertical walls, said members being arranged in the structuretohave said load bearing wall portions and said vertical walls inoverlapping load bearing relationship, and sheet metal reinforcing'meansassociated with said load bearing Wall portions and said vertical wallsin the load bearing position to carry part of the vertical compressivestresses.

9. A cribbing structure comprising hollow sheet metal stretcher andheader members having at one or more points intermediate the endsthereof :flat load bearing wall portions in parallel-spacedrelationship, spacing means including a plurality of vertical walls fortransmitting the load from one load bearing wall to the other, saidmembers bein arrangedin the structure to have said loa bearing wallportions in overlapping load bearing relationship.

10. A cribbing structure comprising substantially tubular stretcher andheader members, means for closing the exposed open ends of the tubularheaders, and portions extending from said means for positioning thecribbing members above or below lthe header..

il. A cribbing structure comprising lsubstantially tubular horizontallyextending stretcherv members assembled in vertical spaced relationship,and a filler plate having a vertical face adapted to.close the spacebetween the stretcher members, said filler plate having edge fiangcsextending normal to the face for securing the plate to the members.

12. A cribbing structure comprising substantially tubular horizontallyextending stretcher members, assembled in vertical spaced relationship,said members having top, side and bottom walls. the top and bottomwallshaving openings therein, and a filler plate having a vertical faceadapted to close the space between the stretcher members, said fillerplate having tongues projecting from the upper and lower edges thereof,said tongues being adapted to enter the openings in the walls.

13. A cribbing structure comprising header and stretcher memberssubstantially tubular in cross-section, said members having at one ormore points thereof horizontally extending load bearing walls lying inparallel spacedrelationship, said members having reinforcing meansassociated with said loadv bearing walls to carry part of the verticalcompressive stresses, and said members being arranged to have said loadbearing walls and reinforcing meansA in vertical load bearingrelationship.

in witness whereof, I hereby aiiix my signature.

GEORGE W. POWERS.

